Fuel-economizer mixer ajstd controller



J. C. CALLERYF FUEL ECONOMIZER MIXER AND CONTROLLER.

APPLICATION FILED OCT-16,1917.

1,31 0, 1 7 3. Pzitented July 15, 1919.

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J. C. GALLERY.

APFLICATION FILED OCT-16.1917.

Patented July 15, 1919.

2 SHEETS-SHEET 2.

FUEL ECONOMIZER MIXER AND CONTROLLER.

JOSEPH C. GALLERY,

0F COLUMBUS, OHIO.

FUEL-ECONOMIZER MIXER AND CONTROLLER.

, Application filed October 16, 1917.

To all whom it may concern:

Be it known that I, JOSEPH C. GALLERY, a citizen of the United States of America, residing at Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Fuel- Economizer Mixers and Controllers, of which the following is a specification.

This invention relates to new and useful improvements in fuel economizer mixer and controller.

' The primary object of the invention is the provision of a fuel economizer having an air and flue-gas mixing means arranged for accurately controlling the inlets thereof when in use and providing for the natural draft of full area when not in use.

The provision of the fuel economizer having a mixer within the outlet flue of a furnace for heating fresh air and furnace gases and returning the mixture to the furnace fire is now in use in the well-known Johns devices and such is not broadly claimed herein. My invention however, is an improvement upon such named devices by providing, first, a more accurate and absolute control of the fresh air and flue gases entering the mixer, whereby'any per cent. of atmospheric air and products of combustion may be obtained and mixed; second, the choking or obstructing of the stack when the mixer is not in use, that occurs in old devices, is substantially obviated by my arrangement of a controlled free passage through the mixer, longitudinally of the mixer inclosing furnace flue or stack.

My objects obtained as above set forth are serviceable in connection with any mixer arranged within the outgoing path of travel of the products of combustion or gases from the burning grate or other source of heat supply for a single heating unit or plurality of units and in which the mixture is forcibly returned to the source of heat supply for aiding combustion and rendering the same substantially complete. The ultimate results are two-fold, viz., the economical conservation of fuel and the absence of escaping smoke with a minimum discharge of heat and gases from the boileror furnace.

With these enumerated objects in view and Y others that will appear as the nature of the invention is better understood, the same consists of the novel combination and arrangement of parts hereinafter fully described,

Specification of Letters Patent.

Patented July 15, 1919.

Serial No. 196,886.

illustrated in the accompanying drawings, and pointed out in the appended claims.

In the drawings, forming a part of this application and in which like reference characters designate corresponding parts throughout the several views.

Figure 1 is a front elevation of a furnace provided with the present device, parts being shown in central vertical section.

Fig. 2 is a vertical sectional view taken upon line 11-11 of Fig. 1, looking in the direction of the arrows, and

Fig. 3 is a front elevation of a plurality of furnaces illustrating an adaptation of my device for use therewith. A general form of furnace 10 is illustrated in Fig. 1, having'a boiler 11 arranged within a setting 12 withthe front plate 13 of the furnace provided with upper doors 14: positioned above the plane of the furnace grate and with lower doors 15 positioned therebeneath, leading to the ash pit while an upright stack or flue 16 is arranged for discharging the products of combustion there through.

An open ended tube or pipe 17 axiall ar ranged longitudinally within the 'stacr 16 constitutes a mixer for the flue gases and for air admitted through a lateral branch pipe 18 of the tube 17, which projects through the side of the stack 16. A conduit 19 communicates with the mixer 17 intermediate the upper and lower ends 20 and 21 thereof respectively and passing through the side of the stack 16 is arranged with branches 22 and 23 discharging respectively above and below the furnace grate'24. A forced draft device 25 in the form of a fan is arranged within the conduit 19 while the dampers 26 and 27 are arranged within the conduit branches 22 and 23 respectively for regulating the flow of mixture therethroug h to the furnace.

The tube 17 being arranged in the direct path of travel of the outgoing gases from the furnace 10 constitutes a combined mixer y it is more advantageous in said end and with the lower end 21 ,of the mixer closed during the operation of the device by means of a damper positioned within the said lower end thereof.

The damper 30 is adapted to close the lower end 21 of the mixer and heater 17 during the operation of the device as a more accurate regulation'of the mixture may be obtained by admitting the furnace gases through the upper end 20 of the mixer at a point relatively near to the admission of fresh air through the branch pipe 18, than by admitting furnace gases into the lower end of the mixer and fresh air thereinto at a point far removed therefrom adjacent the upper end of the mixer. In other words, to bring the furnace gases and fresh air together adjacent the upper end of the mixer 17 so as to provide a longer path of travel therefor through the tube 17 and both heating and mixing said gases and air prior to their entrance into the forced draft -conduit 19, than it is to admit furnace gases substantially directly into the conduit 19 through the lower end 21 of the mixer and derive fresh air ,from a much greater distance from the conduit 19 through the branch pipe 28 adjacent the upper end of the mixer.

The complete control of the fresh air and furnace gases entering the mixer 17 is thereby maintained through the operation of the dampers 28 and 29, so that a highly heated and thoroughly mingled mixture of any desired percentages of the product of combustion and fresh air may be obtained for the draft conduit 19 to be discharged either above or below the grate 24 by the branches 22 and 23 respectively, or both, for burning in the furnace and completing or perfecting the combustion of the plant.

In the event that the forced draft device 25 should discontinue its operations and the device be not utilized, it will be apparent that the tube 17 with either of the dampers 30 or 29 closed would greatly obstruct the natural draft of the stack 16 and would act asa choke adjacent the bottom of the stack. An improved mixer and'heater is thereby prov ded for a fuel economizer which will not interefere with the usual operation of the furnace when the device is not in use but which will by reason of its improved manner of perfect regulation provide an enhanced manner or mode of fuel economy as well as abatement of the smoke nuisance.

One manner of adapting the device to a plurality or battery of furnaces such as 31, similar in form to the furnace 10, is illustrated in Fig.3 of the drawings and in which a breeching or flue 32 leads from the furnaces to a stack or chimney 33. A tube 17 constltutmg a combined mixer and heater is longitudinally arranged within the flue 32 having an air inlet branch pipe 18 leading to the atmosphere and having a controlling damper 28 while the open end 20 of the tube arranged adjacent the stack 33 is pro.- vided with a damper 29. Depending furnace-gas inlet pipes 21 open toward the furnaces 31 suitably controlled by dampers 30'. with a forced feed or draft device 25 having separate outlets or conduits 19 leading therefrom and provided with branches 22' and 23 discharging at points above and below the burning grates of the furnaces 31.

Dampers 26 and 27 are arranged in said upper and lower branches 22 and 23 respectively. An operating motor 34 may be arranged for the forced draft device 25 if desired and it will be understood that in-' stead of arranging separate conduits 19 for the two furnaces 31, a single conduit may lead from the fan 25 having branches discharging above and below the burning grate of each furnace with suitable regulating dampers for separately controlling the admission of mixture to the furnaces.

It will be understood that the operation of the device in connection with a plurality of furnaces is identical to that herein described in connection with the single furnace 10, the dampers30' being closed during the operation of the device and the entrance ofvair and furnace gases to the tube 17' be- The tu be..17 directly communicates I ing controlled by means of the dampers 28 thereof, it will nevertheless be understood that mine-r changes may be made therein without departing from the spirit and 'scope of the appended claims covering my invention herein set forth.

What I claim as new is 1. Inv a furnace provided with a flue and a grate, a combined heater and mixer longitudinally positioned within the flue having open ends therein, a conduit communicating with said heater and mixer and having branches discharging above and below the grate, a forced draft device arranged in said conduit, an air inlet pipe communicating with the heater and mixer spaced'from said conduit, a damper within said inlet pipe and separate controlling dampers arranged controlling dampers adjacent the opposite ends of the mixer, an air inlet pipe communicating with the mixer adjacent the end thereof farthest removed from the furnace and a conduit communicating With the mixer at a point adjacent the end thereof nearest to the furnace and having branches discharging above and below the grate.

3. A combined heater and mixer for fuel 10 economizers comprising an open ended tube having its ends opening axially Within the ue, means arranged adjacentthe opposite ends of the tube adapted for controlling the passage of gases thereinto and therethrough and an air inlet pipe for said tube positioned adjacent one of the open ends thereof and controlling means for said pipe.

In testimony'whereof I afiix my signature.

JOSEPH c. GALLERY. 

